The boy's Atlas Triclimate Jacket by The North Face is a three-in-one jacket that provides waterproof protection with an inner lining jacket added to provide warmth on the colder days of winter. The outer jacket of the Atlas Triclimate is fully waterproof, breathable and is 100% seam sealed so you can assure no water is going to penetrate the jacket leaving you wet and cold. The inner liner is a lightweight fleece giving it a less bulky feel and warmth for your core. Zip the fleece liner out and get a jacket you can wear alone when the sun comes out and the weather temps rise. A great value for buying one jacket and it gives you three.